#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#define ERR_EXIT(m)         \
    do                      \
    {                       \
        perror(m);          \
        exit(EXIT_FAILURE); \
    } while (0)
int main()
{
    umask(0);
    //创建管道
    if (mkfifo("mypipe", 0644) < 0)
    {
        ERR_EXIT("mkfifo");
    }
    //读取管道
    int rfd = open("mypipe", O_RDONLY);
    if (rfd < 0)
    {
        ERR_EXIT("open");
    }
    char buf[1024];
    while (1)
    {
        buf[0] = 0;
        printf("Please wait...\n");
        ssize_t s = read(rfd, buf, sizeof(buf) - 1);
        if (s > 0)
        {
            //读取成功
            buf[s - 1] = 0;
            printf("client say# %s\n", buf);
        }
        else if (s == 0)
        {
            printf("client quit, exit now!\n");
            exit(EXIT_SUCCESS);
        }
        else
        {
            ERR_EXIT("read");
        }
    }
    close(rfd);
    return 0;
}